用简便方法计算下面各题1.Ol×6.3 2.18×3.12+6.88×2.18 4.4×250.25×39+0.25 0.8×5.67×12.5 4.4×3.8+6.6×3.8﹣3.88.6×102 (0.2+4)×25 12.5×32×0.25.
简算: 25×125×4×837×28+37×2(20+8)×125 173+428+2738×10144×25.
480÷(4×6)=480÷4÷6… .
用简便方法计算下列各题 9.7×0.47+1.53×9.710.1×90.
怎样简便怎样算. (1)3250÷(301﹣276)(2)15.17﹣6.8﹣3.2(3)32×57+67×57+57.
简算: 1.2×2.5 3.14×78+31.4×2.2.